1 /* SPDX-License-Identifier: GPL-2.0+ */
3 * Copyright (C) 2017 Texas Instruments Incorporated - http://www.ti.com/
4 * Written by Jean-Jacques Hiblot <jjhiblot@ti.com>
7 #ifndef __GENERIC_PHY_H
8 #define __GENERIC_PHY_H
10 #include <dm/ofnode.h>
12 struct ofnode_phandle_args;
15 * struct phy - A handle to (allowing control of) a single phy port.
17 * Clients provide storage for phy handles. The content of the structure is
18 * managed solely by the PHY API and PHY drivers. A phy struct is
19 * initialized by "get"ing the phy struct. The phy struct is passed to all
20 * other phy APIs to identify which PHY port to operate upon.
22 * @dev: The device which implements the PHY port.
23 * @id: The PHY ID within the provider.
32 * struct udevice_ops - set of function pointers for phy operations
33 * @init: operation to be performed for initializing phy (optional)
34 * @exit: operation to be performed while exiting (optional)
35 * @reset: reset the phy (optional).
36 * @power_on: powering on the phy (optional)
37 * @power_off: powering off the phy (optional)
41 * of_xlate - Translate a client's device-tree (OF) phy specifier.
43 * The PHY core calls this function as the first step in implementing
44 * a client's generic_phy_get_by_*() call.
46 * If this function pointer is set to NULL, the PHY core will use a
47 * default implementation, which assumes #phy-cells = <0> or
48 * #phy-cells = <1>, and in the later case that the DT cell
49 * contains a simple integer PHY port ID.
51 * @phy: The phy struct to hold the translation result.
52 * @args: The phy specifier values from device tree.
53 * @return 0 if OK, or a negative error code.
55 int (*of_xlate)(struct phy *phy, struct ofnode_phandle_args *args);
58 * init - initialize the hardware.
60 * Hardware intialization should not be done in during probe() but
61 * should be implemented in this init() function. It could be starting
62 * PLL, taking a controller out of reset, routing, etc. This function
63 * is typically called only once per PHY port.
64 * If power_on() is not implemented, it must power up the phy.
66 * @phy: the PHY port to initialize
67 * @return 0 if OK, or a negative error code.
69 int (*init)(struct phy *phy);
72 * exit - de-initialize the PHY device
74 * Hardware de-intialization should be done here. Every step done in
75 * init() should be undone here.
76 * This could be used to suspend the phy to reduce power consumption or
77 * to put the phy in a known condition before booting the OS (though it
78 * is NOT called automatically before booting the OS)
79 * If power_off() is not implemented, it must power down the phy.
81 * @phy: PHY port to be de-initialized
82 * Return: 0 if OK, or a negative error code
84 int (*exit)(struct phy *phy);
87 * reset - resets a PHY device without shutting down
89 * @phy: PHY port to be reset
91 * During runtime, the PHY may need to be reset in order to
92 * re-establish connection etc without being shut down or exit.
94 * Return: 0 if OK, or a negative error code
96 int (*reset)(struct phy *phy);
99 * power_on - power on a PHY device
101 * @phy: PHY port to be powered on
103 * During runtime, the PHY may need to be powered on or off several
104 * times. This function is used to power on the PHY. It relies on the
105 * setup done in init(). If init() is not implemented, it must take care
106 * of setting up the context (PLLs, ...)
108 * Return: 0 if OK, or a negative error code
110 int (*power_on)(struct phy *phy);
113 * power_off - power off a PHY device
115 * @phy: PHY port to be powered off
117 * During runtime, the PHY may need to be powered on or off several
118 * times. This function is used to power off the PHY. Except if
119 * init()/deinit() are not implemented, it must not de-initialize
122 * Return: 0 if OK, or a negative error code
124 int (*power_off)(struct phy *phy);
127 * configure - configure a PHY device
129 * @phy: PHY port to be configured
130 * @params: PHY Parameters, underlying data is specific to the PHY function
132 * During runtime, the PHY may need to be configured for it's main function.
133 * This function configures the PHY for it's main function following
134 * power_on/off() after beeing initialized.
136 * Return: 0 if OK, or a negative error code
138 int (*configure)(struct phy *phy, void *params);
142 * struct phy_bulk - A handle to (allowing control of) a bulk of phys.
144 * Consumers provide storage for the phy bulk. The content of the structure is
145 * managed solely by the phy API. A phy bulk struct is initialized
146 * by "get"ing the phy bulk struct.
147 * The phy bulk struct is passed to all other bulk phy APIs to apply
148 * the API to all the phy in the bulk struct.
150 * @phys: An array of phy handles.
151 * @count: The number of phy handles in the phys array.
161 * generic_phy_init() - initialize the PHY port
163 * @phy: the PHY port to initialize
164 * Return: 0 if OK, or a negative error code
166 int generic_phy_init(struct phy *phy);
169 * generic_phy_init() - de-initialize the PHY device
171 * @phy: PHY port to be de-initialized
172 * Return: 0 if OK, or a negative error code
174 int generic_phy_exit(struct phy *phy);
177 * generic_phy_reset() - resets a PHY device without shutting down
179 * @phy: PHY port to be reset
180 *Return: 0 if OK, or a negative error code
182 int generic_phy_reset(struct phy *phy);
185 * generic_phy_power_on() - power on a PHY device
187 * @phy: PHY port to be powered on
188 * Return: 0 if OK, or a negative error code
190 int generic_phy_power_on(struct phy *phy);
193 * generic_phy_power_off() - power off a PHY device
195 * @phy: PHY port to be powered off
196 * Return: 0 if OK, or a negative error code
198 int generic_phy_power_off(struct phy *phy);
201 * generic_phy_configure() - configure a PHY device
203 * @phy: PHY port to be configured
204 * @params: PHY Parameters, underlying data is specific to the PHY function
205 * Return: 0 if OK, or a negative error code
207 int generic_phy_configure(struct phy *phy, void *params);
211 * generic_phy_get_by_index() - Get a PHY device by integer index.
213 * @user: the client device
214 * @index: The index in the list of available PHYs
215 * @phy: A pointer to the PHY port
217 * This looks up a PHY device for a client device based on its position in the
218 * list of the possible PHYs.
221 * usb1: usb_otg_ss@xxx {
222 * compatible = "xxx";
226 * phys = <&usb2_phy>, <&usb3_phy>;
230 * the USB2 phy can be accessed by passing index '0' and the USB3 phy can
231 * be accessed by passing index '1'
233 * Return: 0 if OK, or a negative error code
235 int generic_phy_get_by_index(struct udevice *user, int index,
239 * generic_phy_get_by_index_nodev() - Get a PHY device by integer index
242 * @node: The client ofnode.
243 * @index: The index in the list of available PHYs
244 * @phy: A pointer to the PHY port
246 * This is a version of generic_phy_get_by_index() that does not use a device.
248 * This looks up a PHY device for a client device based on its ofnode and on
249 * its position in the list of the possible PHYs.
252 * usb1: usb_otg_ss@xxx {
253 * compatible = "xxx";
257 * phys = <&usb2_phy>, <&usb3_phy>;
261 * the USB2 phy can be accessed by passing index '0' and the USB3 phy can
262 * be accessed by passing index '1'
264 * Return: 0 if OK, or a negative error code
266 int generic_phy_get_by_index_nodev(ofnode node, int index, struct phy *phy);
269 * generic_phy_get_by_name() - Get a PHY device by its name.
271 * @user: the client device
272 * @phy_name: The name of the PHY in the list of possible PHYs
273 * @phy: A pointer to the PHY port
275 * This looks up a PHY device for a client device in the
276 * list of the possible PHYs based on its name.
279 * usb1: usb_otg_ss@xxx {
280 * compatible = "xxx";
284 * phys = <&usb2_phy>, <&usb3_phy>;
285 * phy-names = "usb2phy", "usb3phy";
289 * the USB3 phy can be accessed using "usb3phy", and USB2 by using "usb2phy"
291 * Return: 0 if OK, or a negative error code
293 int generic_phy_get_by_name(struct udevice *user, const char *phy_name,
297 * generic_phy_get_bulk - Get all phys of a device.
299 * This looks up and gets all phys of the consumer device; each device is
300 * assumed to have n phys associated with it somehow, and this function finds
301 * and gets all of them in a separate structure.
303 * @dev: The consumer device.
304 * @bulk A pointer to a phy bulk struct to initialize.
305 * Return: 0 if OK, or a negative error code.
307 int generic_phy_get_bulk(struct udevice *dev, struct phy_bulk *bulk);
310 * generic_phy_init_bulk() - Initialize all phys in a phy bulk struct.
312 * @bulk: A phy bulk struct that was previously successfully requested
313 * by generic_phy_get_bulk().
314 * Return: 0 if OK, or negative error code.
316 int generic_phy_init_bulk(struct phy_bulk *bulk);
319 * generic_phy_exit_bulk() - de-initialize all phys in a phy bulk struct.
321 * @bulk: A phy bulk struct that was previously successfully requested
322 * by generic_phy_get_bulk().
323 * Return: 0 if OK, or negative error code.
325 int generic_phy_exit_bulk(struct phy_bulk *bulk);
328 * generic_phy_power_on_bulk() - Power on all phys in a phy bulk struct.
330 * @bulk: A phy bulk struct that was previously successfully requested
331 * by generic_phy_get_bulk().
332 * Return: 0 if OK, or negative error code.
334 int generic_phy_power_on_bulk(struct phy_bulk *bulk);
337 * generic_phy_power_off_bulk() - Power off all phys in a phy bulk struct.
339 * @bulk: A phy bulk struct that was previously successfully requested
340 * by generic_phy_get_bulk().
341 * Return: 0 if OK, or negative error code.
343 int generic_phy_power_off_bulk(struct phy_bulk *bulk);
345 #else /* CONFIG_PHY */
347 static inline int generic_phy_init(struct phy *phy)
352 static inline int generic_phy_exit(struct phy *phy)
357 static inline int generic_phy_reset(struct phy *phy)
362 static inline int generic_phy_power_on(struct phy *phy)
367 static inline int generic_phy_power_off(struct phy *phy)
372 static inline int generic_phy_get_by_index(struct udevice *user, int index,
378 static inline int generic_phy_get_by_name(struct udevice *user, const char *phy_name,
385 generic_phy_get_bulk(struct udevice *dev, struct phy_bulk *bulk)
390 static inline int generic_phy_init_bulk(struct phy_bulk *bulk)
395 static inline int generic_phy_exit_bulk(struct phy_bulk *bulk)
400 static inline int generic_phy_power_on_bulk(struct phy_bulk *bulk)
405 static inline int generic_phy_power_off_bulk(struct phy_bulk *bulk)
410 #endif /* CONFIG_PHY */
413 * generic_phy_valid() - check if PHY port is valid
415 * @phy: the PHY port to check
416 * Return: TRUE if valid, or FALSE
418 static inline bool generic_phy_valid(struct phy *phy)
420 return phy && phy->dev;
423 #endif /*__GENERIC_PHY_H */